Heater



A ril23, T ER 1,710,596

HEATER Filed P 11 7 1928 2 Sheets-Sheet l Patented Apr. 23, 1929.

UNITED STATES FRANK F. TURNER, 01 LITTLE FALLS, MINNESOTA.

HEATER.

Application filed April 7,

This invention relates to heaters and more particularly to that type of heater employed for heating residences.

I n important ob ect of the invention is to improve the structure of air or water heaters of this character to insure a more perfect heat transfer to the heated element.

A still further object of the invention is to produce a device of this character which may be very readil constructed, which will be durable and efficient in service, which may be readily cleansed and which is a general improvement in the art.

A still further object of the invention is to provide a structure such that the prod nets of combustion are caused to travel through a course where they are constantly in contact with the conduit containing the element to be heated, thus avoiding those losses occurring in the ordinary furnace construction, due to eddying of the products of combustion therein.

A further object of the invention is to provide a construction, wherein the available heating surface is materially increased.

These and other objects I attain by the construction shown in the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention and wherein Figure 1 is a vertical sectional view through a heater constructed in accordance with my invention, heaters being disclosed as disposed within an ornamental casing;

Figure 2 is a section on the line 22 of Fi re 1;

igure 3 is a section on the line 3-3 of Fi ure 2;

igure 4 is a fragmentary detail View showing a slightly modified form in which the outer wall of the casing is formed as a preheater.

The invention consists broadly in the provision of a sinuous duct 10 for the element to be heated and means coacting with this duct to produce at opposite sides thereof a series of chambers 11 in which each chamher is separated from the adjacent chamber of its series by a fold of the duct and is in communication with the chamber of the series at the opposite side of the duct which lies thereabove by a port 12 disposed at the peak of the fold, the lower arm 13 of which forms the upper wall of the chamber. Each of the arms 13 and 14 of each of the sinuosities is so constructed that its under sur- 1928. Serial No. 288,228.

face inclines upwardly, with the result that.

products of combustion introduced to the lower chamber in any suitable manner will pass to the upper endof this chamber along the upper wall thereof to the port 12 to a second chamber through which it will simllarly pass until it has finally completed its travel through all of the chambers and has engaged against the upper wall of each of the chambers.

As a convenient method of constructing the furnace embodying the invention, two of the ducts 10 are provided and are arranged, so that the chambers of the adjacent faces thereof are in alignment with one another. The front and rear edge walls of the ducts are secured to front and rear wall structures 15 and 16, so that the ends of these chambers are concealed. The upper ends of the ducts communicate with one another and with an outlet, as at 17, while the lower ends thereof are preferably extended vertically, as indicated at 18, to form the side walls of a fire box 19 which may have arranged therein a grate 20 and all necessary accessories thereto. The upper ends of the confronting peaks of the ducts are connected by l'lOI'lzontal partitions 21. The front and rear walls 15 and 16 are connected by side walls 22 and these side walls are connected with the upper ends of the outwardly extending peaks of the ducts by partitions 23. The upper ends of the vertical sections 18 are likewise connected to the side walls by partitions, indicated at 24. Each peak has ports 12 formed therethrough, so that products of combustion rising in the fire box pass outwardly through the ports 12, then upwardly along the lower arms of outwardly extending peaks until they arrive at the space between the peak proper and the side walls when they pass through a second series of orts and upwardly alongthe lower arms of inwardly directed peaks. Here, their travel is stopped by the partition 21 and they are again directed outwardly and the process repeated until enterino' the upper chambers 11, they pass to the smodte pipe 25.

By employing this structure, the products of combustion are maintained in engagement with the surface to be heated through their own tendency to rise, and there is no tendency of these products to separate from these surfaces, so that a maximum heat transfer is obtained.

In construction of a furnace of this character, the lower chamber which actually forms the fire box may be provided with the usual fire door and each chamber thereabove will be in communication with a clean-out door 26 opening either through the front wall 15 or a side wall 22 of the furnace casing. Where the furnace is employed a hot water or steam furnace, the outer casing of the furnace may convenient- 1y be made doublewalled and may form a preheater' casing through which the water is conducted before being led to the lower end of the ducts 10.

I have found that by employing a structure of this character, the cost of heating is materially reduced and a heater structure provided which may be llltlllllfttCblllGCl at a relatively low cost. Since the construction hereinbefore set forth is capable of a certain range of change and modification without materially departing from the spirit of the invention, I do not limit myself to such specific structure except as hereinafter claimed.

I claim 1. In a heater, a substantially Wrtically extending sinuous duet for the medium to be heated, n'ieans coacting therewith producing a series of chambers at each side of the duct,

the ehambein of each series being partitioned from each adjacent chamber of the series by a fold of the channel and being in communication with the overlying chamber of the series at the opposite side of the duct at the peak of said fold.

In a heater, a pair of sinuous ducts for the medium to be heated connected at their upper ends and con'ibining to produce be tween their inner faces a vertical series of chambers, side walls coacting with the outer faces of said ducts to produce at the outer face of each thereof a vertical series of chambers staggered with relation to the named chambers, end walls for said chambers and ports conducting a heating medium from the upper end of each chamber of each series to a higher chamber of one of the other series.

3. In a heater, :1 pair of sinuous ducts for ihe medium torbe heated connected at their upper ends and combining to produce between their inner faces a vertical series of chambers, side walls coacting with the outer faces of said ducts to produce at the outer face of each thereof a vertical series of chambers staggered with relation to the first named cluimbers, end walls for said chain bers, and ports conducting a heatin medium from the upper end of each chamber of each series to a higher chamber of one of the other series, the upper walls of each chamber inclining upwardly toward said ports, the port leading from each chamber entering the eomn'iunicating chamber at the lower end. of the upper wall thereof.

at. In a heater, a pair of sinuous ducts for the medium to be heated connected at their upper ends and cen'ibining to produce between their inner faces a vertical series of chambers, side walls enacting with the outer faces of said ducts to produce at the outer of chaumi-ufs, side walls reacting with the outer faces of said ducts to produce at the outer faces of each thereof a vertical series of chambers staggered with relation to the first named chambers, end walls for said chambers, and ports conducting a heating medium from the upper end of each chamber of each series to a higher chamber of one of the other series, the upper walls of each chamber inclining upwardly toward said ports, the port leading from each chamber entering the con'nnunicating chamber at the lower end of the upper wall thereof, said said ports crossing the duct.

in a heater, a pair of sinuous ducts for the medium to be heated connected at their upper ends and combining to produce between their inner faces a vertical series of chambers, side walls coacting with the outer faces of said ducts to produce at the outer face of each thereof a wrticai series of chambers staggered with relation to the first in "red cinin'ibers, end walls for said chamber, ports conducting a heating meihum from the upper end of each chamber of each series to a higher chamber of one of the otl seri s, said end and side walls having o iieni ngs permitting access to the chambers and doors closing said openings.

'i', In a heater, a pair of sinuous ducts for the mediijim to be heated connected at their upper ends and combining to produce be tween their inner faces a vertical series of 1 chambers, side walls coacting with the outer faces of said ducts to produce at the outer face of each thereof a vertical series of chambers staggered. with relation to the first named chambers, end walls for said chain here, or d ports conducting a heating med um from the upper end of each chiunber of each series to 21 hi ghcr chamber of one of the other series, the lower chamber of the first named series jli'ormiire,- a lire box, the upper chamber thereof being adapted for eonneetion with a smoke pipe.

8. In a heater, a pair of sinuous ducts for the medium to be heated connected at their upper ends and combining to produce be tween their inner faces a vertical series of 9. Ina heater, a vertically sinuous duct chambers, side walls coacting with the outer for the medium to be heated, and means for faces of said ducts to produce at the outer conducting a heating medium from the face of each thereof a vertical series of bottom to the top of said duct at the exterior chambers staggered with relation to the thereof alternately directing the heating 15 first named chambers, end Walls for said medium against the lower wall of folds at chambers, and portsiconducting a heating opposite sides of the duct.

medium from the upper end of each cham- In testimony whereof I hereunto aflix my her of each series to a higher chamber of signature. 10 one of the other series. FRANK F. TURNER. 

